Zeolite treating process

Claim 2

A process of treating a charge zeolite selected from the group consisting of (i) mordenite having a silica to alumina mole ratio of about 10-120, (ii) silicalite having a silica to alumina mole ratio of about 350-370, and (iii) dealuminated Y-zeolite having a silica to alumina mole ratio of about 3-10 and a Lattice Constant of about 24.30A-24.60A, which charge is characterized by the absence of secondary pores of diameter of about 100-600A which comprises contacting said charge zeolite with steam at 1000° F.-1500° F.; maintaining said charge zeolite in said contact with steam for 5-60 hours during which time, said charge zeolite is converted into a hydrothermally-treated zeolite characterized by (i) decreased Lattice Constant of 24.23A-24.38A, (ii) a Secondary Pore Size of l00A-600A, (iii) an increased Secondary Pore Volume of 0.05-0.15 cc/g and (iv) a Secondary Pore Mode of 100A-325A; and recovering said hydrothermally-treated zeolite.

Claim 3

A process of treating a charge zeolite as claimed in claim 1 wherein said charge zeolite is a dealuminated Y-zeolite having a silica to alumina mole ratio of about 3-10.

Claim 4

A process of treating a charge zeolite as claimed in claim 1 wherein said charge zeolite is a mordenite having a silica to alumina mole ratio of about 10-120.

Claim 5

A process of treating a charge zeolite as claimed in claim 1 wherein said charge zeolite is a silicalite having a silica to alumina mole ratio of about 350-370.

Claim 6

A process of treating a charge zeolite as claimed in claim 1 wherein said contacting with steam is carried out at 1300° F.-1450° F.

Claim 7

A process of treating a charge zeolite as claimed in claim 1 wherein said contacting with steam is carried out at about 1400° .

Claim 8

A process of treating a charge zeolite as claimed in claim 1 wherein said contacting with steam is carried out for 16-36 hours.

Claim 9

A process of treating a charge zeolite as claimed in claim 1 wherein said contacting with steam is carried out for about 16 hours.

Claim 10

A process of treating a charge dealuminated ultrastable Y-zeolite in ammonium form having a silica to alumina mole ratio of 7-14 and a lattice constant of 24.50A-24.60A which comprises contacting said charge zeolite with steam at 1300° F.-1450° F.; maintaining said charge zeolite in said contact with steam for 16-36 hours during which time said charge zeo-lite is converted into a hydrothermally-treated zeolite characterized by (i) a decreased unit cell size of 24.23-24.38A, (ii) a Secondary Pore Size of 100A-600A, (iii) an a Secondary Pore Volume of 0.05-0.15cc/g, and (iv) a Secondary Pore Mode of 100A-325A; and recovering said hydrothermally-treated zeolite.

Claim 11

A process of treating a charge dealuminated ultrastable Y-zeolite in ammonium form having a silica to alumina mole ratio of 7-14 and a lattice constant of 24.50A-24.60A which comprises contacting said charge zeolite with steam at 1300° F.-1450° F.; maintaining said charge zeolite in said contact with steam for 16-36 hours during which time said charge zeo-lite is converted into a hydrothermally-treated zeolite characterized by (i) a decreased unit cell size of 24.23-24.38A, (ii) a Secondary Pore Size of 100A-600A, (iii) an a Secondary Pore Volume of 0.05-0.15cc/g, and (iv) a Secondary Pore Mode of 100A-325A; and recovering said hydrothermally-treated zeolite.

Claim 12

A novel zeolite characterized by (i) a lattice constant of about 24.23A-24.38A, (ii) a Secondary Pore Size of 100A-600A, (iii) an increased Secondary Pore Volume of 0.05-0.15 cc/g and (iv) a Secondary Pore Mode of 100A-325A.

Claim 13

A novel zeolite characterized by (i) a lattice constant of about 24.23A-24.38A, (ii) a Secondary Pore Size of 100A-600A, (iii) an increased Secondary Pore Volume of 0.05-0.15 cc/g and (iv) a Secondary Pore Mode of 100A-325A.

Claim 14

A novel hydrothermally treated, dealuminated Y-zeolite characterized by (i) a Lattice Constant of 24.23A-24.38A, (ii) a Secondary Pore Size of 100A-600A, (iii) an increased Secondary Pore Volume of 0.05-0.15 cc/g, and (iv) a Secondary Pore Mode of 100-325A.

Claim 15

A novel hydrothermally treated, dealuminated Y-zeolite characterized by (i) a Lattice Constant of 24.23A-24.38A, (ii) a Secondary Pore Size of 100A-600A, (iii) an increased Secondary Pore Volume of 0.05-0.15 cc/g, and (iv) a Secondary Pore Mode of 100-325A.

Claim 16

A novel hydrothermally treated, dealuminated Y-zeolite as claimed in claim 11 wherein said decreased Lattice Constant is 24.23A-24.29A.

Claim 17

A novel hydrothermally treated, dealuminated Y-zeolite as claimed in claim 11 wherein said dealuminated Y-zeolite is prepared from a charge mordenite having a silica to alumina mole ratio of about 10-120.

Claim 18

A novel hydrothermally treated, dealuminated Y-zeolite as claimed in claim 11 wherein said dealuminated Y-zeolite is prepared from a charge silicalite having a silica to alumina mole ratio of about 350-370.

Claim 19

A novel hydrothermally treated, dealuminated Y-zeolite as claimed in claim 11 wherein said dealuminated Y-zeolite is prepared from a charge dealuminated ultrastable Y-zeolite having a silica to alumina mole ratio of 7-14.

Claim 20

A novel hydrothermally treated, dealuminated Y-zeolite as claimed in claim 11 wherein said dealuminated Y-zeolite is prepared from a charge dealuminated super ultrastable Y-zeolite having a Lattice Constant of about 24.30A-24.60A.

Claim 21

A novel hydrothermally treated dealuminated zeolite prepared by the process which comprises contacting, with steam at 1000° F.-1500° F. a charge zeolite selected from the group consisting of (i) mordenite having a silica to alumina mole ratio of about 10-120, (ii) silicalite having a silica to alumina mole ratio of about 350-370, (iii) dealuminated Y-zeolite having a silica to alumina mole ratio of about 3-10 and a Lattice Constant of about 24.30A-24.60A, which charge is characterized by the absence of secondary pores of diameter of about 100-600A, maintaining said charge zeolite in said contact with steam for 5-60 hours during which time, said charge zeolite is converted into a hydrothermally-treated zeolite characterized by (i) decreased Lattice Constant of 24.23A-24.38A, (ii) a Secondary Pore Size of 100A-600A, (iii) a Secondary Pore Volume of 0.05-0.15 cc/g and (iv) a Secondary Pore Mode of 100A-325A; and recovering said hydrothermally-treated zeolite.

Claim 22

A novel hydrothermally treated dealuminated zeolite prepared by the process which comprises contacting, with steam at 1000° F.-1500° F. a charge zeolite selected from the group consisting of (i) mordenite having a silica to alumina mole ratio of about 10-120, (ii) silicalite having a silica to alumina mole ratio of about 350-370, (iii) dealuminated Y-zeolite having a silica to alumina mole ratio of about 3-10 and a Lattice Constant of about 24.30A-24.60A, which charge is characterized by the absence of secondary pores of diameter of about 100-600A, maintaining said charge zeolite in said contact with steam for 5-60 hours during which time, said charge zeolite is converted into a hydrothermally-treated zeolite characterized by (i) decreased Lattice Constant of 24.23A-24.38A, (ii) a Secondary Pore Size of 100A-600A, (iii) a Secondary Pore Volume of 0.05-0.15 cc/g and (iv) a Secondary Pore Mode of 100A-325A; and recovering said hydrothermally-treated zeolite.